Type	Working Air Pressure Range (Mpa)	Range of Hole Diameter	Back Adapter Thread	Mathched Bits
TH79	1.2~2.1	Φ90~105	2-3/8API REG	DHD3.5
TH98	1.3~2.1	Φ110~138	2-3/8API REG	COP44,DHD340
TH122	1.2~2.2	Φ138~156	2-3/8API REG	COP54,DHD350R
TH139	1.3~2.4	Φ155~190	3-1/2API REG	COP64,DHD360
TH180	1.3~2.4	Φ203~279	4-1/2API REG	DHD380
TH220	1.3~2.4	Φ255~350	5-1/2API REG	TH220
TH275	1.6~2.5	Φ305~445	6-5/8API REG	DHD112
TH398	2.0~2.8	Φ445~605	8-5/8API REG	TH398